FtpWebRequest.Timeout 屬性
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
取得或設定等待要求的毫秒數。
public:
virtual property int Timeout { int get(); void set(int value); };public override int Timeout { get; set; }member this.Timeout : int with get, setPublic Overrides Property Timeout As Integer屬性值
Int32值，其中包含要求逾時之前要等候的毫秒數。預設值為 Infinite。
例外狀況
指定的值小於零且不是 Infinite。
由於已經在進行的要求，已為這個屬性指定新的值。
範例
下列程式代碼範例會設定這個屬性。
static bool UploadUniqueFileOnServer( Uri^ serverUri, String^ fileName )
{
// The URI described by serverUri should use the ftp:// scheme.
// It contains the name of the directory on the server.
// Example: ftp://contoso.com.
//
// The fileName parameter identifies the file containing the data to be uploaded.
if ( serverUri->Scheme != Uri::UriSchemeFtp )
{
return false;
}
// Get the object used to communicate with the server.
FtpWebRequest^ request = dynamic_cast<FtpWebRequest^>(WebRequest::Create( serverUri ));
request->Method = WebRequestMethods::Ftp::UploadFileWithUniqueName;
// Don't set a time limit for the operation to complete.
request->Timeout = System::Threading::Timeout::Infinite;
// Copy the file contents to the request stream.
const int bufferLength = 2048;
array<Byte>^buffer = gcnew array<Byte>(bufferLength);
int count = 0;
int readBytes = 0;
FileStream^ stream = File::OpenRead( fileName );
Stream^ requestStream = request->GetRequestStream();
do
{
readBytes = stream->Read( buffer, 0, bufferLength );
requestStream->Write( buffer, 0, bufferLength );
count += readBytes;
}
while ( readBytes != 0 );
Console::WriteLine( "Writing {0} bytes to the stream.", count );
// IMPORTANT: Close the request stream before sending the request.
requestStream->Close();
FtpWebResponse^ response = dynamic_cast<FtpWebResponse^>(request->GetResponse());
Console::WriteLine( "Upload status: {0}, {1}", response->StatusCode, response->StatusDescription );
Console::WriteLine( "File name: {0}", response->ResponseUri );
response->Close();
return true;
}
public static bool UploadUniqueFileOnServer (Uri serverUri, string fileName)
{
// The URI described by serverUri should use the ftp:// scheme.
// It contains the name of the directory on the server.
// Example: ftp://contoso.com.
//
// The fileName parameter identifies the file containing the data to be uploaded.
if (serverUri.Scheme != Uri.UriSchemeFtp)
{
return false;
}
// Get the object used to communicate with the server.
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
request.Method = WebRequestMethods.Ftp.UploadFileWithUniqueName;
// Set a time limit for the operation to complete.
request.Timeout = 600000;
// Copy the file contents to the request stream.
const int bufferLength = 2048;
byte[] buffer = new byte[bufferLength];
int count = 0;
int readBytes = 0;
FileStream stream = File.OpenRead(fileName);
Stream requestStream = request.GetRequestStream();
do
{
readBytes = stream.Read(buffer, 0, bufferLength);
requestStream.Write(buffer, 0, bufferLength);
count += readBytes;
}
while (readBytes != 0);
Console.WriteLine ("Writing {0} bytes to the stream.", count);
// IMPORTANT: Close the request stream before sending the request.
requestStream.Close();
FtpWebResponse response = (FtpWebResponse) request.GetResponse();
Console.WriteLine("Upload status: {0}, {1}",response.StatusCode, response.StatusDescription);
Console.WriteLine ("File name: {0}", response.ResponseUri);
response.Close();
return true;
}
備註
若要指定無限值，請將 Timeout 屬性設定為 Infinite (-1) 。 這是預設值。
Timeout 是使用 GetResponse 方法進行的同步要求等候回應以及 GetRequestStream 方法等候數據流的毫秒數。 如果資源未在逾時期間內回應，要求會 WebException 擲回 ，並將 Status 屬性設定為 Timeout。
在呼叫、 或 方法之後變更Timeout會導致例外狀況。BeginGetRequestStreamBeginGetResponseGetResponseGetRequestStreamInvalidOperationException
功能變數名稱系統 (DNS) 查詢最多可能需要 15 秒才能傳回或逾時。如果您的要求包含需要解析的主機名，而且您設定 Timeout 為小於 15 秒的值，則擲回 之前 WebException 可能需要 15 秒以上的時間，以指出要求逾時。
